/*------------------------------------------------------------------------------
* Copyright (C) 2003-2006 Ben van Klinken and the CLucene Team
*
* Distributable under the terms of either the Apache License (Version 2.0) or
* the GNU Lesser General Public License, as specified in the COPYING file.
------------------------------------------------------------------------------*/
#ifndef _lucene_search_PhraseScorer_
#define _lucene_search_PhraseScorer_
#if defined(_LUCENE_PRAGMA_ONCE)
# pragma once
#endif
#include "clucene/search/phrasequeue.h"
#include "clucene/search/phrasepositions.h"
#include "clucene/search/scorer.h"
#include "clucene/search/similarity.h"
CL_NS_DEF(search)
class PhraseScorer: public Scorer {
private:
Weight* weight;
float_t freq;
bool firstTime;
bool more;
protected:
uint8_t* norms;
float_t value;
PhraseQueue* pq; //is used to order the list point to by first and last
PhrasePositions* first; //Points to the first in the list of PhrasePositions
PhrasePositions* last; //Points to the last in the list of PhrasePositions
public:
//Constructor
PhraseScorer(Weight* weight, CL_NS(index)::TermPositions** tps,
int32_t* positions, Similarity* similarity, uint8_t* norms);
virtual ~PhraseScorer();
int32_t doc() const { return first->doc; }
bool next();
float_t score();
bool skipTo(int32_t target);
void explain(int32_t doc, Explanation* ret);
TCHAR* toString();
protected:
virtual float_t phraseFreq() =0;
//Transfers the PhrasePositions from the PhraseQueue pq to
//the PhrasePositions list with first as its first element
void pqToList();
//Moves first to the end of the list
void firstToLast();
private:
bool doNext();
void init();
void sort();
};
CL_NS_END
#endif